Steam-generator.



APPLICATION FILED JAN. 23.1903.

PATENTED SEPT. 18, 1906. G. A. WALTON.

STEAM GENERATOR.

`2 SHEETS-SHEET 1.

Wl'lrlesses: l)

W fnl/@nim RW 0 9 1 81 1I. T P E s D E T N E T A P N. 0 T L A W A. GW 4.. 2 l L 3 8 0. N

STEAM GENERATOR.

APPLICATION FILED JAN.zs,19o3.

2 SHEETS-SHEET z.

Qin @in Qin ein go oro 0:10 01o @11o oro ojo @zo ozb @no 6.o

Qin ooo :n aio ma 6%"539 @12o 63o cro a 6oto oto QI Qo @D nl: Naam: pnsns co1 wnsmncrcn, n.1:A

' Be it known that I, GEORGE A. WALToN, a

. generators shown in the accompanying draw- York, county of New York, and State of New ber, and I also provide a superheater for the .and in proximity to the flashing-points of UNITED sTATEs OF NEW YORK, N. Y.

GEORGE A. WALTON,

STEAM-GE No. 831,124. Specification of Application iiled January 23 .To all whom it may concern:

subject of the King ofGreat Britain, residing in the borough of Manhattan, city of New York, have invented certain new and useful Improvementsin Steam-Generators, of which the following is a specification, reference being had therein to the accompanying drawly invention relates to steam-generators, and more particularly to that type of steamgenerators wherein generator-tubes are provided extending downwardly from the lower crown-sheet and looped at their lower portions and terminating upwardly in the steams ace of the boiler, so asl to provide `steamashing points in close .proximity to the heating burner or fire.

According to my invention I provide a flue or flues leadin upward through the body of the boiler in a dition to an annular flue provided between the boiler shell and casgAccording to my invention I .provide a preheater for the feed-water comprising a coil arranged within the combustion-chamsteam led out from the boiler, also comprising a coil within such combustion-chamber the generator-tubes.

My invention includes various improvements in the construction and combination of arts.

will now describe the constructions of ings, and will thereafter point out my invention in claims.

Figure 1 is a vertical central section of a steam-generator embodying my invention. Fig. 2 is an elevation of the generating parts of my device with the casing removed. Fig. 3 is a plan view ofthe same, showing several of the generator-tubes in dotted lines to illustrate the relative arrangement thereof. Fi 4 is a vertical central section of a modiie construction of generator embodying my invention, the casing not being shown. Fig. 5 is a plan view of the same, partially broken away, on the line 5 5 of Fig. f1.

The 'generator is shown as inclosed within a casing 1, at the lower part of which is held NERATOR.

Letters Patent.

,1903. Serial No. 140.208.

Patented Sept. 18, 1906.

a hydrocarbon-burner 2, having flame-oriees 3 and air-passages 4, these air-passages being the only openings from the outer air into the combustion-chamber. The casing terminates at its upper end in a cap-piece 5, having a centrally-arranged stack 6, through which the products of combustion escape.

The boiler is shown as supported in the casing by means of inwardly-projecting vanes 7 and comprises a shell composed of a side wall 8, a lower crown-sheet 9, and an upper crown-sheet 10. A plurality of generator elements or tubes 11 is provided, .these tubes depending from the lower crown-sheet 9, and each of these tubes is looped or U- shaped and has ends of unequal length, one end terminating below the water-line 25 25 and, as shown, at the lower crown sheet, and the other end terminating above such waterline. These generator-tubes are shown with depending portions of dill'erent lengths; but this feature forms no part of' my invention.

Within the boiler and above the upper extremities of the generator-tubes is provided a deflector-dome 12, the function of which is to catch any particles of unvapororized water which may be projected upward from the generator-tubes, so that the steam which rises above this deilector-dome shall be substantially free from unvaporizcd particles, and the space above the deilectordome between it and the looped crownsheet 1() is the upper steam-space or steamdome of the generator. The deiector-dome 12 is supported by means of sleeves or pipes 13, embracing the tie-bolts 14 and extending up from the lower crown-sheet 9 to the delector-dome 12 and is held from upward movement by shorter sleeves or pipes 15, 1

'encircling the upper portions of the tie-bolts ,above the deilector-dome 12, the delectordome being perforated just sufficiently to permit the tie-bolts to pass through it and the ends of the sleeves or pipes abutting against the dellector-dome.

I provide in the construction shown in Figs. .1 to 3, inclusive, a single flue 16 extending entirely through the boiler from the lower crown-sheet 9 to the upper crownsheet 10, and in the construction shown in Figs. 4 and 5 a plurality of such flues 16, comprising one central flue and six iiues arranged mdially between the central lue and the IOO outer annular fiue which is provided between the casing and the outer wall of the boilershell. The construction shown in Figs. 4 and 5 I prefer to employ in a larger boiler than that shown in Figs. 1 to 3, inclusive. The effect of this single central flue or plurality of flues in coperation with the annular outer passage-way or flue is to uniformly distribute the currents of heated gases arising from the burner among the depending portions of the several generator-tubes, as well-as to provide heat-radiating surfaces passing through the body of the boiler, and

I have found in practice that such construction produces a highly-effective generation of steam.

=A preheater is provided for the Watel` which is fed into the boiler, such preheater comprising a coil of piping 17, arranged in the combustion-chamber outside of the generator-tubes, such coil commencing at a convenient distance above the burner and comprising a plurality of turns and terminating below the lower crown-sheet 9 of the boiler, so as-to leave ample space for the flow of .heated gases above the preheating-coil and between the crown-sheet and preheating-coil. This coil is sho'wn as having its convolutions contiguous, constituting a closed coil located in close proximity to the group of generatorl elements or loops 11, thereby forming a wall and causing the gases of combustion from the central portion of the grate or burner to pass `upward to the crown-sheet or bottom of the boiler before they enter the annular space or flue surrounding the boiler, while the gases from the outer portion or burner of the grate will pass upward between the outside of this closed coil and the casing. The inlet 18 of the preheating-coil 17 is located at the lower part thereof, and the feed-inlet 19 from the preheating-coil to the boiler is located at the upper part of the preheating-coil. With this construction the water in its passa e to the boiler is highly heated and enters t e boiler at a high temperature.

For the purpose of superheating the steam, so as to insure its delivery in a superheated or dry condition, I provide a superheatingcoil 20, which encircles the generator-tubes at the lower parts thereof and in close proximity to the burner. In the construction shown in Figs. 1 to 3, inclusive, this superheating-eoil comprises a single turn, while in the construction shown in Figs. 4 and 5 this superheating-coil comprises two turns. The steam enters the superheating-coil by the pipe 21, extending from the upper steam-chamber or steam-dome of the boiler and extending down through the annular flue between the shell of the boiler and the casing, (see Fig. 2,) and leaves the superheating-coil by the pipe 22, which extends upward through such annular ue.

It is obvious that various modifications may be made 1n the construction shown and labove particularly described within the casing, generator-elements depending from the boiler, a preheating-coil in the casing having its convolutions substantially contiguous and surrounding the generator elements and arranged to provide a passage between its upper portion and the boiler, and a superheating-coil-also surrounding thegenerator elements.

2. A steam-generator comprising a casing provided with a heating-chamber, a boiler arranged within such casing so as to `provide a flue around the boiler between the boiler and casing, such boiler having looped generator-tubes depending therefrom into the heating-chamber and having one or more flues extending therethrough from the heating-chamber, and a preheating-coil in the heating-chamber surrounding said tubes and arranged to provide a passage between the heating-coil and boiler, substantially as sct forth.

3. A Steam-generator comprising a casing provided with a heating-chamber, a boiler arranged within such casing so as to provide a flue around the boiler between the boiler and casing, such boiler having looped generator-tubes depending therefrom into the heating-chamber and having one or more 'ilues extending therethrough from the heatingchamber, a preheating-coil in the heatingchamber surrounding said tubes and arranged to provide a passage between the preheating-coil and boiler and a superheatingcoil in said heating-chamber surrounding said tubes and arranged below the preheatingcoil, substantially as set forth.

4. A steam-generator comprising a casing provided with a heating-chamber, a boiler arranged within such casing so as to provide an annular Hue between the boiler and casin such boiler having looped generatortu es depending therefrom into the heatingchamber, eachof such generator-tubes having ends of unequal len h terminating in the boiler respectively be ow and above the Water-level, a deflector-dome in such boiler above the upper ends of the generator-tubes, such boiler having one or more flues extending therethrough from the heating-chamber, a preheating-coil in the heating-chamber surrounding said generator-tubes, and a superheating-coil in the heating-chamber also surrounding said tubes and arranged below the preheating-coil, substantially as set forth.

5. A steam-generator comprising a boiler IOO IIO

having looped generator tubes extending bolts abutting against the deileotor-donie,

therefrom into the heating-chamber, each of substantially as set forth.

such generator-tubes having ends of unequal In testimony whereof l have aflixed my length terminating in the boiler respectively signature in presence of two witnesses. 5 below and above the Water-level, such boiler GEORGE A. VVALTON.

havingl tie-bolts, and a deeotor-dome se- Witnesses:

cured in the boiler above the upper ends of HENRY D. VILLIAMS, the generator-tubes by sleeves about said tie- HENRY BARNES. 

